Based on natural polymers

Both synthetic and naturally occurring polymers have been used as CSPs. Figure 3.2 shows typical CSPs prepared from optically active polymers (1-18) 1-15 are totally synthetic polymers, including vinyl polymers (1-7), polyamides (8-12), polyurethanes (13), polyacetylene (14), and polysaccharide analogue (15). The CSPs 16-18 are based on natural polymers, proteins (16), and polysaccharides (17, 18). 

Plastics based on natural polymers Regenerated cellulose... 

Hydrophilic polymer sorbents are mainly based on natural polymers, for example, agarose and polymethacrylates. Some newly developed phases use poly-vinylethers or hydrophilized poly-styrene/divinylbenzenze copolymers. These materials vdll be discussed in the form of their functionalized products. Nevertheless, some of the... 

The obtaining of nanoparticles based on natural polymer constitutes a major concern for many research teams because of their accessibility and their environmental compatibility. Information on the synthesis of hgnin nanoparticles containing products are relatively hmited and covered by patents. 

Figure 1.1 gives an overview of bio-based plastics. The distinction between materials based on natural polymers and those polymerized from bio-derived monomers can be seen from this. 

Plastics raw materials are synthetic polymers and oligomers, as well as a series of semisynthetics based on natural polymers. Additives may be of low or of high molar mass. The additives may, for example, act as fillers, plasticizers, colorants, lubricants, or antioxidants. 

Rawlicka, A., D.C. Dragunski, K.V. Guimaraes, and C.O. Avellaneda. 2004. Electrochromic devices with solid electrolytes based on natural polymers. Mol Cryst Liq Crysf 416 105-112. 

In this chapter, we intend to present the obtaining and properties of new types of nanocomposites based on natural polymer (collagen) and bioactive compounds (natural layered silicate modified with maleic copolymers) which can be used as biomateiial, scaffold for bone tissue regeneration. 

Considering the product groups, the highest growth rates are expected for hot-melt systems and polymer dispersions and emulsions. A continuing decrease will occur for adhesives based on natural polymers (animal and vegetable), solvent-based adhesives, and systems based on water-soluble polymers. 

We are now discovering a expansive spectrum of new polymeric materials with properties which are superior to those achievable with the "old synthetic" systems, in addition to a renewed interest in the more conventional natural polymers. A full review of these new polymeric systems, derived from or based on natural polymers, is beyond the scope of this paper some are illustrated in other chapters of this book. We 11 only highlight a few specific cases here. 

---